87225228 has 48 divisors (see below), whose sum is σ = 226652160. Its totient is φ = 29009232.

The previous prime is 87225217. The next prime is 87225233. The reversal of 87225228 is 82252278.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 87225192 and 87225201.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79701 + ... + 80787.

It is an arithmetic number, because the mean of its divisors is an integer number (4721920).

Almost surely, 2^87225228 is an apocalyptic number.

It is an amenable number.

87225228 is an abundant number, since it is smaller than the sum of its proper divisors (139426932).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

87225228 is a wasteful number, since it uses less digits than its factorization.

87225228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1843 (or 1835 counting only the distinct ones).

The product of its digits is 35840, while the sum is 36.

The square root of 87225228 is about 9339.4447372421. Note that the first 3 decimals coincide. The cubic root of 87225228 is about 443.4868066203.

The spelling of 87225228 in words is "eighty-seven million, two hundred twenty-five thousand, two hundred twenty-eight".